Add GOG Mac path

Thanks to LeonBlade for the path.

README.md

@@ -84,6 +84,9 @@ The configuration will check your custom path first, then fall back to the defau
 still compile on a different computer).
 
 ## Versions
+1.5 (upcoming):
+* Added default GOG path on Mac.
+
 1.4:
 * Fixed detection of non-default game paths on 32-bit Windows.
 * Removed support for SilVerPLuM (discontinued).

build/smapi.targets

@@ -17,6 +17,7 @@
     <GamePath Condition="!Exists('$(GamePath)')">$(HOME)/.local/share/Steam/steamapps/common/Stardew Valley</GamePath>
 
     <!-- Mac -->
+    <GamePath Condition="!Exists('$(GamePath)')">/Applications/Stardew Valley.app/Contents/MacOS</GamePath>
     <GamePath Condition="!Exists('$(GamePath)')">$(HOME)/Library/Application Support/Steam/steamapps/common/Stardew Valley/Contents/MacOS</GamePath>
 
     <!-- Windows -->